SMIAOER Bluetooth Bookshelf Speakers,Winkison Portable Bluetooth Speakers with Subwoofer Built-in Microphone, Enhanced Bass, Long Playtime Perfect Speakers for Home SUPERIOR SOUND QUALITY:Enjoy the impressively crystal clear sound. Dual 5W drivers and bass-boosting passive radiator, without distortion even at highest volume.Bluetooth Speaker provides sound companion to all your smart devices, furnishing you with room-filling sound through its dual powered speakers and passive radiator. BLUETOOTH 4.1 TECHNOLOGY :Equipped with the advanced Bluetooth 4.1 technology.Up to 66 feet wireless range, Fast connection and Low latency.Connects over bluetooth wirelessly to favourite devices such as iphone, mac,ipad, smartphones, tablets or computer. STYLISH AND ELEGANT APPEARANCE : This Bluetooth speaker is designed with fashionable & Eco-Friendly , will be good match with your home, office.Its digital system gives you clear high, warm mid-range and rich low frequencies. BUILT-IN MICROPHONE SUPPORT HANDS-FREE CALLING: Built-in microphone When you connect the Bluetooth Speaker with your cellphone,you could Pick up a call or Hang up the call conveniently by press the speakers Multifunction Key. LONG BATTERY LIFE :Built-in 4000mah Rechargeable Battery for up to 24 hours of all day playtimeat 50% volume.